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/*
* Copyright (c) 2015 Tom Herbert <tom@herbertland.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
*/
#ifndef __ILA_H
#define __ILA_H
#include <linux/errno.h>
#include <linux/ip.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/socket.h>
#include <linux/skbuff.h>
#include <linux/types.h>
#include <net/checksum.h>
#include <net/ip.h>
#include <net/protocol.h>
#include <uapi/linux/ila.h>
struct ila_locator {
union {
__u8 v8[8];
__be16 v16[4];
__be32 v32[2];
__be64 v64;
};
};
struct ila_identifier {
union {
struct {
#if defined(__LITTLE_ENDIAN_BITFIELD)
u8 __space:4;
u8 csum_neutral:1;
u8 type:3;
#elif defined(__BIG_ENDIAN_BITFIELD)
u8 type:3;
u8 csum_neutral:1;
u8 __space:4;
#else
#error "Adjust your <asm/byteorder.h> defines"
#endif
u8 __space2[7];
};
__u8 v8[8];
__be16 v16[4];
__be32 v32[2];
__be64 v64;
};
};
enum {
ILA_ATYPE_IID = 0,
ILA_ATYPE_LUID,
ILA_ATYPE_VIRT_V4,
ILA_ATYPE_VIRT_UNI_V6,
ILA_ATYPE_VIRT_MULTI_V6,
ILA_ATYPE_RSVD_1,
ILA_ATYPE_RSVD_2,
ILA_ATYPE_RSVD_3,
};
#define CSUM_NEUTRAL_FLAG htonl(0x10000000)
struct ila_addr {
union {
struct in6_addr addr;
struct {
struct ila_locator loc;
struct ila_identifier ident;
};
};
};
static inline struct ila_addr *ila_a2i(struct in6_addr *addr)
{
return (struct ila_addr *)addr;
}
static inline bool ila_addr_is_ila(struct ila_addr *iaddr)
{
return (iaddr->ident.type != ILA_ATYPE_IID);
}
struct ila_params {
struct ila_locator locator;
struct ila_locator locator_match;
__wsum csum_diff;
u8 csum_mode;
};
static inline __wsum compute_csum_diff8(const __be32 *from, const __be32 *to)
{
__be32 diff[] = {
~from[0], ~from[1], to[0], to[1],
};
return csum_partial(diff, sizeof(diff), 0);
}
static inline bool ila_csum_neutral_set(struct ila_identifier ident)
{
return !!(ident.csum_neutral);
}
void ila_update_ipv6_locator(struct sk_buff *skb, struct ila_params *p,
bool set_csum_neutral);
void ila_init_saved_csum(struct ila_params *p);
int ila_lwt_init(void);
void ila_lwt_fini(void);
int ila_xlat_init(void);
void ila_xlat_fini(void);
#endif /* __ILA_H */
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